On 9/29/2012 9:12 PM, Robert G. Strickland wrote:
What I'm curious about is whether some such device, at the feed point of a
doublet,
in turn fed by window line is of any use [assuming an appropriate tuner at
the radio
end of the line]. You have said, accurately so, that a current choke at
On 9/30/2012 12:02 AM, Jim Brown wrote:
YES! That is EXACTLY what I have repeated, over and over again. It has
NOTHING to do with coax. Coax, if it is not decoupled by a common mode
choke, simply ADDS to the imbalance that is already present. EVERY
transmission line needs a common mode
Phil,
It is great that you actually know the length of your feedline - most do
not.
I am not questioning how well your antenna/feedline combination works.
All I am trying to get across is that for any claims about how easy a
particular antenna is to tune (with a tuner in the shack), the length
.
-Original Message-
From: Adrian [mailto:vk4...@bigpond.com] Sent: Sunday, 30 September
2012 9:34 AM
To: elecraft@mailman.qth.net
Subject: RE: [Elecraft] Balanced solution for KAT500 tuner?
A UK G call did a graphed efficiency comparison test with the 1:1
coming out
on top. I
In the old days, when RFI did not exist (few of us are old enough not
to remember TVI in the 50s), the Windom MIGHT have been a good idea.
Today, with RF noise sources everywhere and home stereo rigs full of
Pin One Problems ready to bring RF into equipment and detect it,
Windom antennas are
Don,
You must think system rather than individual components. Also with
antennas and feedlines, the where is it connected is a required parameter.
A halfwave dipole in infinite space has a feedpoint impedance of 70
ohms, but brought down to practical heights, the feedpoint impedance is
September
2012 9:34 AM
To: elecraft@mailman.qth.net
Subject: RE: [Elecraft] Balanced solution for KAT500 tuner?
A UK G call did a graphed efficiency comparison test with the 1:1
coming out
on top. I will post it when re-found.
Also from
http://www.theladderline.com/doublets-ladder-line
Designs offer a nice example in their Model 1171.
-Original Message-
From: Adrian [mailto:vk4...@bigpond.com] Sent: Sunday, 30 September
2012 9:34 AM
To: elecraft@mailman.qth.net
Subject: RE: [Elecraft] Balanced solution for KAT500 tuner?
A UK G call did a graphed efficiency
On 9/30/2012 5:37 AM, gold...@charter.net wrote:
So am I correct in my understanding or just totally out in the weeds.
There may be more to it than that. First, no matter what feedline or
matching system you use, there should be a serious common mode choke at
the feedpoint. Second, is this a
.
-Original Message-
From: Adrian [mailto:vk4...@bigpond.com] Sent: Sunday, 30 September
2012 9:34 AM
To: elecraft@mailman.qth.net
Subject: RE: [Elecraft] Balanced solution for KAT500 tuner?
A UK G call did a graphed efficiency comparison test with the 1:1
coming out
on top. I
I believe Joe meant to say ...higher impedance results in lower currents...
--[snip]
Within limits, most tuners are better able to handle high impedance
mismatches than low impedance mismatches because losses tend to be
resistive in nature and the lower impedance results in lower currents
and
Does Elecraft have a balun solution for balanced feeders for the KAT500 at 500
watts?
Steve Barry
University at Buffalo Police
Bissell Hall, Amherst Campus
Tel: 716,645-2228 or 645-8910
Cell: 716,207-9494
FAX: 716,645-3758
__
On 9/29/2012 5:40 AM, Barry, Stephen wrote:
Does Elecraft have a balun solution for balanced feeders for the KAT500 at
500 watts?
See the Choke Cookbook that is Chapter 8 in my RFI Tutorial, and the
discussion in the preceding pages, for an excellent common mode choke
that will satisfy this
Hi,
So are you suggesting using a choke balun on both ends of the parallel wire
feedline?
AB2TC - Knut
Jim Brown-10 wrote
On 9/29/2012 5:40 AM, Barry, Stephen wrote:
Does Elecraft have a balun solution for balanced feeders for the KAT500
at 500 watts?
See the Choke Cookbook that is
I have the same question. The parallel wire feeder can pick up noise also by
itself.
Bob
K6UJ
On Sep 29, 2012, at 11:10 AM, ab2tc wrote:
Hi,
So are you suggesting using a choke balun on both ends of the parallel wire
feedline?
AB2TC - Knut
Jim Brown-10 wrote
On 9/29/2012 5:40
I have the same question. The parallel wire feeder can pick up noise also by
itself.
Bob
K6UJ
On Sep 29, 2012, at 11:10 AM, ab2tc wrote:
Hi,
So are you suggesting using a choke balun on both ends of the parallel wire
feedline?
AB2TC - Knut
Jim Brown-10 wrote
On 9/29/2012 5:40
Jim...
Is there anything to be gained in putting a 1:1 balanced isolator at the feed
point
of an antenna that is fed by a parallel wire feed line? Does such an
arrangement
achieve feed line isolation while preserving the ability of such an antenna to
be
driven on various bands other than
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Balanced solution for KAT500 tuner?
Jim...
Is there anything to be gained in putting a 1:1 balanced isolator at the
feed point of an antenna that is fed by a parallel wire feed line? Does
such an arrangement achieve feed line isolation while
On 9/29/2012 11:10 AM, ab2tc wrote:
So are you suggesting using a choke balun on both ends of the parallel wire
feedline?
Not just a suggestion, but a STRONG recommendation. But leave the word
balun out of this sentence. It is a COMMON MODE CHOKE -- a section of
parallel wire line wound
://mailman.qth.net/mailman/listinfo/elecraft elecraft at
mailman.qth.net
Subject: Re: [Elecraft] Balanced solution for KAT500 tuner?
Jim...
Is there anything to be gained in putting a 1:1 balanced isolator at the
feed point of an antenna that is fed by a parallel wire feed line? Does
On 9/29/2012 11:26 AM, Robert G. Strickland wrote:
Is there anything to be gained in putting a 1:1 balanced isolator at the
feed point
of an antenna that is fed by a parallel wire feed line? Does such an
arrangement
achieve feed line isolation while preserving the ability of such an antenna
On 9/29/2012 2:13 PM, Adrian wrote:
1:1 current balun has proven more efficient in conjunction with the
appropriate balanced (matchbox style)tuner.
With good choke at the feedpoint and at the input to an unbalanced
tuner, there should be NO advantage to using the balanced tuner.
73, Jim K9YC
September 2012 4:26 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Balanced solution for KAT500 tuner?
Jim...
Is there anything to be gained in putting a 1:1 balanced isolator at the
feed point of an antenna that is fed by a parallel wire feed line? Does
such an arrangement achieve feed
...@mailman.qth.net] On Behalf Of David Gilbert
Sent: Sunday, 30 September 2012 8:37 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Balanced solution for KAT500 tuner?
I don't believe that is necessarily true. Can you cite a reference to back
up that statement? Or at least describe
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Gilbert
Sent: Sunday, 30 September 2012 8:37 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Balanced solution for KAT500 tuner?
I don't believe that is necessarily true. Can you cite a reference to back
up that statement? Or at least
: RE: [Elecraft] Balanced solution for KAT500 tuner?
A UK G call did a graphed efficiency comparison test with the 1:1 coming out
on top. I will post it when re-found.
Also from
http://www.theladderline.com/doublets-ladder-line-and-automatic-remote-tuner
s ; (spell-checked)
There is also some
, 30 September 2012 4:26 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Balanced solution for KAT500 tuner?
Jim...
Is there anything to be gained in putting a 1:1 balanced isolator at the
feed point of an antenna that is fed by a parallel wire feed line? Does
such an arrangement
on the braid of
the
transmitter cable.
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Gilbert
Sent: Sunday, 30 September 2012 10:57 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Balanced solution for KAT500 tuner
@mailman.qth.net
Subject: RE: [Elecraft] Balanced solution for KAT500 tuner?
A UK G call did a graphed efficiency comparison test with the 1:1 coming out
on top. I will post it when re-found.
Also from
http://www.theladderline.com/doublets-ladder-line-and-automatic-remote-tuner
s ; (spell-checked
: Adrian [mailto:vk4...@bigpond.com]
Sent: Sunday, 30 September 2012 9:34 AM
To: elecraft@mailman.qth.net
Subject: RE: [Elecraft] Balanced solution for KAT500 tuner?
A UK G call did a graphed efficiency comparison test with the 1:1 coming out
on top. I will post it when re-found.
Also from
http
Phil,
That depends on the exact length of your feedline and the lengthy of
your radiator.
As I indicated, the impedance in the shack will depend on the feedline
length, a well as your radiator length. Would you kindly share both
lengths with us so we can duplicate your results.
If you are
A 50 ohm non inductive purely resistive DL looks good to a MFJ 459 antenna
analyser too.
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Post:
Jim...
Thanks for your reply. I think I've been unclear in my question. I'm not
concerned as
to what it is called, how to build it or what it costs. These things can
all be
agreed upon and implemented.
What I'm curious about is whether some such device, at the feed point of a
doublet,
in
Don,
Actually, my antenna works quite well and so far is the best performing wire
antenna I have raised
up for 80/40/30. My previous delta loop was pretty good for 80/30 but it was a
bit too narrow due to limited
space and the and 40 just did not perform as well as I had hoped.
My 450 ohm
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